package com.akbar.interceptor;

import com.akbar.constant.JwtClaimsConstant;
import com.akbar.context.BaseContext;
import com.akbar.properties.JwtProperties;
import com.akbar.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/*
* jwt令牌校验的拦截器
* */
@Component
@Slf4j
public class JwtTokenAdminInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;


    /*
    * 校验jwt
    * */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        String token = request.getHeader(jwtProperties.getAdminTokenName());
        try {
            Claims claims = JwtUtil.parseJWT(jwtProperties.getAdminSecretKey(), token);
            Long empId = Long.valueOf(claims.get(JwtClaimsConstant.EMP_ID).toString());
            log.info("当前登录用户id：{}", empId);
            BaseContext.setCurrentId(empId);
            // 通过放行
            return true;
        } catch (Exception e) {
            log.error("JWT 校验失败: ", e);
            response.setStatus(401);
            return false;
        }
    }


    /*
    * 清除ThreadLocal中的数据
    * */
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        BaseContext.removeCurrentId();
    }
}
